Home / 28,890.15-39,867.91-16,143.54

Finding the Fourth Proportional to 28,890.15, 39,867.91 and 16,143.54

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Solution

The fourth proportional to 28,890.15, 39,867.91 and 16,143.54 is: 22,277.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.15 : 39,867.91 = 16,143.54 : x
  2. Step 2: Convert to fraction form
    28,890.15/39,867.91 = 16,143.54/x
  3. Step 3: Cross multiply
    28,890.15x = 39,867.91 × 16,143.54
  4. Step 4: Simplify right side
    28,890.15x = 643,609,199.80
  5. Step 5: Solve for x
    x = 643,609,199.80/28,890.15
  6. Step 6: Final answer
    x = 22,277.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.